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Canon EOS-1D Mark IV

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Canon’s EOS-1D Mark III failed to impress some professional photographers, but perhaps the new 16.1-million-pixel Canon EOS-1D Mark IV version will regain their confidence


Although the EOS-1D Mark IV is quoted as having an APS-H-sized sensor like its predecessor, it is interesting that the dimensions of the imaging device have actually shrunk marginally from 28.1×18.7mm in the EOS-1D Mark III to 27.9×18.6mm in the new camera. As before, this puts it between an APS-C and a full-frame device, and it produces a 1.3x focal length magnification factor. However, this isn’t the only difference between the two sensors. For many people, the most important point is that the effective pixel count has been increased from 10.1 million to 16.1 million, and this has necessitated a drop in pixel size (in microns) from 7.2×7.2µm to 5.7×5.7µm.

This could have negative repercussions for the signal-to-noise ratio, but Canon has introduced a range of measures to help minimise image noise levels. For instance, the photodiodes occupy a greater proportion of the pixel area to increase the size of the light-receiving area and a new material has been used for the primary colour filter to boost light transmission. As with the EOS 7D and EOS 550D, the microlenses over the EOS-1D Mark IV’s sensor are gapless and closer to the photodiode than before to boost light capture. Canon also claims that noise suppression has been improved and that doubling the internal gain of the preamp helps increase the signal-to-noise ratio.

All these measures, plus improvements brought by the switch from dual Digic III to dual Digic 4 processors, means Canon has felt confident enough to give the EOS-1D Mark IV a sensitivity range of ISO 100-12,800, which can be expanded to the equivalent of ISO 50-102,400. The impressively high maximum sensitivity setting matches the highest value possible with the camera’s main competitor, the Nikon D3S.

The EOS-1D Mark IV is primarily aimed at photojournalists and sports photographers who demand a high continuous shooting rate. Despite its much higher pixel count, the EOS-1D Mark IV is capable of shooting at the same maximum rate – 10fps – as its predecessor. This gives the Canon camera a 1fps advantage over the Nikon D3S.

Given the problems with the EOS-1D Mark III’s AF, it is hardly surprising that Canon has introduced a completely new system for the EOS-1D Mark IV, with new hardware and firmware. I will cover this in greater detail later, but the important aspects are that it has 45 user-selectable points, with 39 being f/2.8-sensitive cross-type.

Video-recording technology is fast becoming essential in a photojournalist’s camera and the EOS-1D Mark IV can record movies as MOV files at three sizes. These are 1920×1080 pixels (Full HD), 1280×720 pixels (HD) and 640×480 pixels (SD) with MPEG-4 AVC compression and a selection of frame rates available at each size.

With such a well-specified camera it seems almost churlish to point out that the EOS-1D Mark IV doesn’t have a built-in level like Canon’s top-end APS-C-format DSLR, the EOS 7D, or the Nikon D3S. And now that Canon has finally seen the light and introduced wireless flash control via the pop-up flash unit of the enthusiast-level EOS 7D, perhaps it is time for the company to include the technology found in its ST-E2 Speedlite Transmitter in a professional-level DSLR.

  • Dioptre Adjustment: -3 to +1 dioptre
  • White Balance: Auto, 6 presets, plus 5 custom and Kelvin settings (2,500-10,000K)
  • Built-in Flash: No
  • Shutter Type: Electronically controlled focal-plane
  • Memory Card: CF and SD/SDHC (not SDXC)
  • Viewfinder Type: Optical
  • Output Size: 4896x3264 pixels
  • LCD: 3in, 920,000 dots (307,000 pixels)
  • Field of View: Approx 100% with 0.76x magnification and 20mm eye-point
  • AF Points: Reflex mode: 45 automatically or manually selectable points. Live View mode: 45-point phase detection in Quick mode or single vari-zone selection contrast detection in Live Mode; face detection
  • White Balance Bracket: 3 exposures with blue/amber & magenta/green adjustment
  • Sensor: CMOS sensor with 16.1 million effective pixels
  • Max Flash Sync: 1/300sec with EOS-dedicated external Speedlite flashgun
  • Focal Length Mag: 1.3x
  • Exposure Modes: PASM
  • Weight: 1,180g (without battery or card/s)
  • Power: Rechargeable Li-Ion LP-E4 battery (supplied)
  • File Format: Raw, S-raw (4MP), M-raw (9MP) JPEG, raw (any size) and JPEG simultaneously
  • Drive Mode: Single, high-speed continuous, low-speed continuous, self-timer (2sec or 10sec delay), silent single shooting, mirror lock-up
  • Shutter Speeds: 60-1/8000sec in 1⁄3 steps plus bulb
  • Colour Space: Adobe RGB, sRGB
  • Exposure Comp: ±3EV in 1⁄3 or 1/2EV steps
  • RRP: £4,799.99
  • Lens Mount: EF
  • ISO: ISO 100-12,800 in 1/3EV or 1EV steps, expandable to include L1 (ISO 50), H1 (ISO 25,600), H2 (ISO 52,600) and H3 (ISO 102,400)
  • Focusing Modes: Manual, one-shot, AI Servo (continuous) AF
  • DoF Preview: Yes
  • Dimensions: 156x156.6x79.9mm
  • Metering System: 63-zone evaluative, centreweighted, spot (3.8%) and partial (13.5%)
  • Connectivity / Interface: USB 2.0 Hi-Speed/HDMI
  • Compression: 10-stage JPEG
  • Tested as: Professional - level DSLR

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